Not going anywhere near the whiskers, they are there for a reason. Ears and fetlocks will be trimmed, but ears will not be boned out, just tidied up.
Re the practicing ahead, I'm only doing it because I had honestly NO idea if I'd be able to get her to stand for braiding... and washing was expected to be a huge challenge, she hates water. Turns out it's not as hard as I expected, which is nice, and I'll probably do a few more practice runs between now and the show. I want to have her presented nicely enough that we have half a chance in best presented, but I don't want to take off anything that I believe is important (like whiskers)